German
Beat the flour, eggs, water, 1 tsp of salt and the nutmeg into a thick, sticky batter until it forms bubbles; rest it for 10 minutes.
Melt the butter in a frying pan over medium heat and fry the onions for 15-20 minutes, stirring often, until deep golden; heat the oven to 180C.
Bring a large pot of water with 1 tbsp of salt to a boil and press the batter through a spaetzle maker or scrape it off a wet board in thin strips, in 3-4 batches.
When the spaetzle float, boil for 1 minute more, then lift them out with a slotted spoon.
Layer the hot spaetzle and the cheese in a warm baking dish, seasoning each layer with pepper, finishing with cheese.
Bake for 8-10 minutes until the cheese has melted, then top with the fried onions and chives and serve.